You can rotate the cam shaft to where only two valves are opened by the rocker arm/cam. The idea is to put the head in that position and then use the tool to relieve the spring pressure from those two actuated arms. You might be able to substitute the BMW tool with two individual valve spring compressors that would work on an installed head like this one. I take a different approach when I remove the rocker arm shaft (pull retaining clips, move rockers around so that the two actuated arms are out of line with cam lobes).
Anyway, once the rocker shaft is unweighted, it should slide out with little to no persuasion if the head isn't warped. If the head is even a little warped, the rocker shaft can put up a real fight. Maybe even break a casting on the head. If you're missing the threaded end plug, it could be an indicator that someone has already wrestled a shaft into a less than perfect head.
Starting to look like you can't get out of pulling the head for this.
Anyway, once the rocker shaft is unweighted, it should slide out with little to no persuasion if the head isn't warped. If the head is even a little warped, the rocker shaft can put up a real fight. Maybe even break a casting on the head. If you're missing the threaded end plug, it could be an indicator that someone has already wrestled a shaft into a less than perfect head.
Starting to look like you can't get out of pulling the head for this.

Comment